crosagove



(No Modal.) K 3 She'et's-Sheet J'.. CROSGROVE. SIRAIGYHENING BENDING,AND PUNGHNG MACHINE. No. 296,279.

Patented Apr'..1,l1884.

(No Model.) 3 Sheets-Sheet .J. ORQSGRUVE. STRAIGHTENING, BENDING, ANDPUNGHING MACHINE.

No. 296.279. Patented Apr( l, '1.884.

(No'Model.) 3 Sheets-Sheet 3.

J. GROSGROYE. J STRAIGHTBNIN BENDING, AND PUNGHING MACHINE.

Nn. 296,279. Patented Apr. l, 1884.

WJ LIVESSES.- "Zm/ JNVENTOR TTURNY UNITED STATES ATENT EE'TcEsTnAleH-rculrve, BEND-ING,

AND PUNCHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 296,279, dated April 1,1884.

Application filed October 31, 1883. (No model.)

.To a-Z whom t may concern:

Beit known that I, JaMEs Gnosenovn, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Straightening, Bending, and Punching Machines;and I do hereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same, reference beinghadto the accompanying drawings, which form a part of this specieation, inwhich Figure l is a side elevation of my machine, showing ypunch and dieattachment. Fig. 2 is a planmview with bending or straighteningattachment. Fig. 3 is a longitudinal vertical section of detail, showingthe two-part moving head. Fig. 4 is a cross-section of same. Fig. 5 is adetail section of eccentric end ofpitman. Fig. 6 is a detail view of thewedge. Fig. E is a plan view of cent1-al part of machine with plate Vremoved.

This invention relates to the construction of that general class ofmachines for the purpose of straightening or bending or punching bars orsheets of meta- 5 and it consists in the peculiar form and arrangementof parts, whereby the moving head of the machine may be quickly adjusted to the varying thickness to be operated on or thedegree of bend tobe given the metal bars or sheets.

In the drawings, A is the bedA of the machine, having the abutment oranvil B doveta-iled to receive the die c, or bending or straighteningblock d, as shown. In the bearing E, at the rear end of frame or bed A,is j onrnaled the main shaft F, having the usual fly-wheel and pulley atone end, and at the other thepinion G. 'Pinion G meshes with thespur-wheel H, whose shaft I is journaled4 in the pillow-blocks J, and isformed with an eccentric, it, at its center, between the journals. Gnthis eccentric k is a heavy pitman, L, which gives motion to the movingpart of the press in the following manner:

The moving head is made in two separate parts, part M fitting the frameA so as to slide therein, and part N fitting and sliding in thelextension of part M. The front of 5o part M is at right angles to itslength, but the rear of part N is slightly inclined, so that between thetwo there is a wedge-shaped space. Each of the two parts M and N isformed with the groove o in its top, near the adjacent rear and front,as shown in Figs. l and 3, so that the grooves o converge like saidfaces.

A wedge-block, l?, corresponding in angular disposition to the adjacentfaces of parts M and N, is provided with the overhanging top having thetongues or tenons q, as shown, which fit the grooves c on parts M and N.The iit is made neat, so that the faces of the block P are in intimatecontact, respectively, with the front and rear of parts M and N, besideshaving the tenons q lying in grooves o. By this construction it isobvious that a movement inwardly or outwardly (transversely) of thewedge-block P will force the head N away from or'draw it toward the partM in a positive manner, and` in all positions interpose a solid block ofmetal between the two moving parts, so that the strains and shocks ofoperation are properly provided against.

A slotted lever, R, pivoted to the frame A, or` to a bracket thereon,forms a convenient means of adjustment, whereby the wedgeblock Imay beadapted to the requirements of the material under operation while themachine is in motion.

The pitman L has the T-head s s, which seats in a bearing in the rearend of sliding head M, and is held there by the saddle -bars t, (seeFig. 3,) bolted to head M.

.The double head M N is retained in position vertically by thecover-plate V, bolted to the frame A.

I claim as my inventionl.. In a straightening, bending, or punchingmachine, the combination, with the moving head M, of the supplementaryhead N, sliding therein, an interposed wedge, l?, between said heads,and adapted to move transversely thereof and give them positiveadjustment to and from one another, and a pivoted lever, R, connected tosaid wedge, substantially as described, whereby the necessaryadjustments may beV readily made between the In testimony that I claimthe foregoing as 1o strokes. my own I have hereto affixed my signaturein 2. The combination of head M, having top presence of two Witnesses.groove, o, and head N, having top groove, o, the adjacent faces of oneor both heads being JAMES CROSGROVE. inclined, the Solid Wedge-block P,having the angularly-set overhangin g tenons q, fitting Said Vitnesses:grooves o, and a pivoted lever, R, substan- THOMASJ. PATTERSON, tiallyas described. T. J. MOTIGHE.

